I play Halo 2 on live, but I havent played in a while because I cant get the interent connected to my xbox at my dorm. Ill give you my name in a pm if you want it to.
I used to play all the time, mostly Rainbow 6:Vegas, Crackdown, Gears of War, and a few others. But now the 4 tanks we have take up all my spare time. And for what it is worth, I don't miss it all that much either. For example, I had a short day at work today, and now I'm posting on a fish forum, about to head out to pick up some new lights for the 210.
I play Halo 2, but have moved back in to my parents house for the past 6 months and their crap DSL is horrible for online play. Just moved into a new apartment and get 6 meg internet soon so I will be back on. My user name is "Evil Yard Gnome".